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Finding the Fourth Proportional to 158,729.69, 219,042.04 and 87,107.87

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Solution

The fourth proportional to 158,729.69, 219,042.04 and 87,107.87 is: 120,206.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,729.69 : 219,042.04 = 87,107.87 : x
  2. Step 2: Convert to fraction form
    158,729.69/219,042.04 = 87,107.87/x
  3. Step 3: Cross multiply
    158,729.69x = 219,042.04 × 87,107.87
  4. Step 4: Simplify right side
    158,729.69x = 19,080,285,544.85
  5. Step 5: Solve for x
    x = 19,080,285,544.85/158,729.69
  6. Step 6: Final answer
    x = 120,206.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.